41 results about "Surface plasmon excitation" patented technology

The present invention is directed to optical structures and methods detecting the fluorescence of a molecule using metal-enhanced fluorescence. In particular, the invention describes the use of surface plasmon excitation for excitation of fluorophores near the metal surface and the efficient collection of the emission by coupling into the plasmon resonance and directing towards the detector. More particularly, the present invention makes use of the unique directionality of the plasmon induced fluorescence signal. The present invention is directed to optical structures using metal enhanced fluorescence including: an optical fiber having a conductive external coating; a light emitting diode (LED) having a conical shaped depression with curved sides on a front end surface, the curved sides having a conducting coating on the outer surface with respect to the LED.

The present disclosure concerns a means to use at least a form of electromagnetic excitation or light-matter interaction, including solar or laser energy to generate localized conditions that enable initiation and spatial and temporal control of catalysis, chemical reactions, deposition, synthesis, photocatalysis, electrocatalysis and catalytic processes. Initiation and spatial and temporal control may be obtained by restricting and directing the electromagnetic excitation or light-matter interactions to specific objects or features embedded or located in or on a host matrix material or substrate. In some implementations this provides a means to use electromagnetic excitation to initiate and control chemical synthesis or reactions without entirely or partially heating any of or all of the reaction chamber, reactor mass, reaction precursors and products, or reactor substrate. It may further provide for the use of temperature sensitive elements or substrates. The method of use could include initiation and control of light-matter interactions addressed at optical and other frequencies to generate controlled localized thermal conditions. A further implementation concerns a means to employ electromagnetic excitation or light-matter interactions to generate localized thermal conditions to initiate or control or cause the combination, separation, reformation or reclamation of a gas, a combination of gasses, a material or a combination of materials in the form of a gas, plasma, solid or liquid. The method of use disclosed could provide a means to initiate and control chemical reactions for the generation, use, transfer and output of controlled localized thermal heat or energy. The method of use disclosed could provide a means to realize and control local thermal conditions down to or below the length scale of a single nanometer and down to or below the timescale of a single picosecond. In some implementations surface plasmon excitations may be used to realize and control local thermal conditions down to or below the length scale of a single nanometer and down to or below the timescale of a single picosecond.

A fiber-optic surface plasmon resonance sensor may include an optical fiber and a surface plasmon excitation layer. The optical fiber may include a core, a cladding surrounding the core, and a depression. The surface plasmon excitation layer may include a first excitation layer, a second excitation layer and an optical waveguide layer between the first excitation layer and the second excitation layer. Incident light incident through the core may be coupled to the surface plasmon excitation layer at a specific angle of incidence and wavelength satisfying the surface plasmon resonance condition. Depending on the polarizing direction of the incident light, an s-polarized component may be coupled to the guided-wave mode in the optical waveguide layer constituting the surface plasmon excitation layer.

The present invention is directed to optical structures and methods detecting the fluorescence of a molecule using metal-enhanced fluorescence. In particular, the invention describes the use of surface plasmon excitation for excitation of fluorophores near the metal surface and the efficient collection of the emission by coupling into the plasmon resonance and directing towards the detector. More particularly, the present invention makes use of the unique directionality of the plasmon induced fluorescence signal. The present invention is directed to optical structures using metal enhanced fluorescence including: an optical fiber having a conductive external coating; a light emitting diode (LED) having a conical shaped depression with curved sides on a front end surface, the curved sides having a conducting coating on the outer surface with respect to the LED.

The invention relates to the chiral modulator technology and provides a multi-functional chiral modulator which works in a terahertz band and has a simple structure, and chiral dependent transmission,chiral dependent surface plasmon excitation, chiral polarization state control and the like can be achieved. Therefore, the terahertz chiral modulator based on a superstructure hole structure is disclosed, the superstructure hole structure is formed by four layers which are a metasurface metal ring, a dielectric layer, a metal plate hollowed out in the middle and a dielectric layer from the top to bottom, metal strip pair resonators are employed by basic units of the metasurface metal ring of the top layer, each of the metal strip pair resonators is formed by two same metal strips which are perpendicular to each other, the metal strip pair resonators are uniformly and rotatingly arranged around a center point O to form the metal ring, the center of the metal ring is opposite to the centerof a metal hole made in the metal plate. A strong magnetic effect can be generated by the design of the metal ring, the dielectric layer and the metal plate. The terahertz chiral modulator is mainlyapplied to the design and manufacture of chiral modulators.

A lens-free ultrathin imaging sensor using a compound-eye vision modality can be formed by forming a metasurface on each pixel of an array of pixels in a solid state imaging sensor. The metasurface can be configured to form a diffraction grating that directs light incident on the metasurface at a predefined angle to excite surface plasmon polaritons into the solid state imaging sensor and light incident at any other angle is reflected or diffracted away from the metasurface. Each pixel of the imaging sensor can be configured using the metasurface to only receive light incident from a different portion of a field of view. A computational imaging system can be used to construct the image from the individual pixels.

A sub-wavelength scale optical lasing device, for the controlled transfer of a signal in nano- and other small-scale technologies. An array of sub-wavelength size holes is first milled, or otherwise embedded, into a thin metal film. This film is combined with optically active media to compensate for losses of the metal. Optical signals are emitted in the active media, and then transferred to the metal so that surface plasmon polaritons are excited. Lasing occurs as a result of the compensation of plasmonic losses by the available optical gain.

The invention belongs to the field of new energy sources, and discloses a perovskite solar cell using graphene quantum dots as a hole-transporting material. The perovskite solar cell consists of a substrate, a transparent electrode, a graphene quantum dot hole-transporting layer, a perovskite absorption layer, an electron transport layer and a metal electrode, and is characterized in that the graphene quantum dots are used as the hole transport layer, and noble metal nanoparticles are modified in the graphene quantum dots, so that the excellent charge carrier mobility characteristic of the graphene quantum dots can be fully utilized, and the hole mobility of the perovskite cell is improved; and moreover, through the surface plasmon excitation phenomenon of noble metals, the absorption efficiency of the cell to light can be enhanced, the absorption and conversion efficiency of the cell to light can be further effectively improved, so that the photoelectric conversion efficiency of the perovskite solar cell is greatly enhanced.

The present invention provides an AC plasma display device using metal nanostructures, including: a front panel and a rear panel which are disposed in parallel to each other and at least one of which is provided with electrodes for gas discharge; an electrode layer, a front dielectric layer and a protective film which are sequentially formed on a side of the front panel which faces the rear panel; a phosphor layer which is formed on the rear panel and which is excited and simultaneously radiated by gas discharge occurring in the electrodes; and metal nanostructures included in the protective film and the phosphor layer, and provides a method of manufacturing the same. The AC plasma display device can improve a secondary electron emission coefficient and photoluminescent intensity using surface plasmon excitation because it is provided with a protective film including metal nanostructures.

[Problem] An object of the present invention is to provide a method by which the amount of a very small amount of analyte (in particular, one having a sugar chain) can be measured with a high accuracy and a device which is used for said measurement method.[Means for Solution] The method for measuring the amount of an analyte according to the present invention is characterized in that a lectin labeled with a fluorescent dye, preferably said lectin whose dissociation rate constant [kd] is from 1.0×10−6 to 1.0×10−3 (S−1), is used as a secondary antibody in a sandwich assay using a surface plasmon excitation enhanced fluorescence spectroscopy [SPFS; Surface Plasmon-field enhanced Fluorescence Spectroscopy].

A fiber-optic surface plasmon resonance sensor may include an optical fiber and a surface plasmon excitation layer. The optical fiber may include a core, a cladding surrounding the core, and a depression. The surface plasmon excitation layer may include a first excitation layer, a second excitation layer and an optical waveguide layer between the first excitation layer and the second excitation layer. Incident light incident through the core may be coupled to the surface plasmon excitation layer at a specific angle of incidence and wavelength satisfying the surface plasmon resonance condition. Depending on the polarizing direction of the incident light, an s-polarized component may be coupled to the guided-wave mode in the optical waveguide layer constituting the surface plasmon excitation layer.

The present invention provides a mask, a grating and a manufacturing method thereof, and belongs to the technical field of display. The mask comprises a surface plasmon excitation structure for exciting plasma interference optical wave under ultraviolet light irradiation and a plasma interference optical wave transmission structure for transmitting and shaping the plasma interference optical wave.The thickness of the plasma interference optical wave transmission structure is greater than a threshold. With the mask of the present invention, a high-precision grating can be prepared.

The invention provides a needle tip enhanced Raman spectrum microscopic imaging device. The device comprises: an exciting light unit for generating a radially polarized light beam; a surface plasmon excitation unit used for receiving the radially polarized light beam and exciting the radially polarized light beam to generate surface plasmon; and a scanning unit comprising a scanning probe, whereinthe scanning probe and the surface plasmon are hybridized to form a surface plasmon field hybridization unit, and the exciting light unit, the detection unit and the scanning unit are connected witha monitoring unit. Surface plasmon polaritons are generated through radial polarized light excitation and are focused to generate a surface plasmon polariton virtual probe, a gap structure formed between a scanning probe and a surface plasmon unit is hybridized with the surface plasmon to generate the surface plasmon field hybridization unit, so that a surface local electric field is enhanced, anenhanced Raman spectrum signal of a to-be-detected sample is obtained, and microscopic imaging of the sample is further realized by utilizing a Raman spectrum obtained by measurement.

The invention relates to the near field optical technical field, and provides a surface plasmon optical tweezer device comprising an exciting light unit, a surface plasmon excitation unit and a scan control and monitoring unit; the surface plasmon excitation unit comprises a glass slide plated with a metal film, a to-be-dynamically controlled and directionally rotating micro-nano composition solution is placed on the glass slide; the exciting light unit is used for forming a vortex light beam, and emitting the vortex light beam into the surface plasmon excitation unit; the surface plasmon excitation unit is used for using the vortex light beam to respectively excite a convergence surface plasmon vortex light field on the metal film and the hydrosphere surface of the micro-nano compositionsolution; the surface plasmon vortex light field can dynamically control and directionally rotate the micro-nano compositions in the micro-nano composition solution; the scan control and monitoring unit is used for monitoring the dynamical control and directional rotation of the micro-nano compositions in real time. The micro-nano compositions can be stably captured and dynamically controlled in fixed points in the surface plasmon vortex light fields.

A device for exciting surface plasmons includes a light illuminating source, a transparent substrate having a ridge, a metal layer covering side surfaces of the ridge and their neighboring region, and a thin metal film formed on a top face of the ridge. Evanescent waves caused by light emitted from the light illuminating source and transmitted through the transparent substrate and the thin metal film can excite surface plasmons in the thin metal film.

The present invention belongs to the technical field of implantable bioelectronic devices and discloses a passive type flexible retinal prosthesis and a preparation method thereof. The retina prosthesis comprises a flexible substrate, a first encapsulation layer disposed on the flexible substrate and a functional layer disposed on a surface of the first encapsulation layer away from the flexible substrate. The functional layer comprises a light absorbing layer, the constituent material of the light absorbing layer is doped with silicon nanoparticles, and a sub-micron microporous array structure is formed in the flexible substrate or the functional layer. According to the invention, the light absorption rate and the photoelectric conversion efficiency are improved by using a microporous structure with good light absorption ability and the surface plasmon excitation effect of the silicon nanoparticles, the flexibility is good, and the applicability is high.

A localized surface plasmon resonance sensor may include a localized surface plasmon excitation layer including a chalcogenide material. The chalcogenide material may include: a first material including at least one of selenium (Se) and tellurium (Te); and a second material including at least one of germanium (Ge) and antimony (Sb). The localized surface plasmon excitation layer may be prepared by forming a thin film including the chalcogenide material and crystallizing the thin film to have a predetermined pattern by irradiating laser on the thin film.

The invention provides a Raman spectrum scanning imaging system based on SPP thermoelectric optical tweezers. The system includes an excitation light unit, a surface plasmon excitation unit, and an SPP thermoelectric effect unit. Light beams generated by the excitation light unit are emitted to the surface plasmon excitation unit, the surface plasmon excitation unit excites a converging surface plasmon special light field under light beam irradiation, and the SPP thermoelectric effect unit carries out optical tweezers capture in the special light field. Stable capture on nano-level particles can be realized, and dynamic Raman spectrum scanning imaging in a range of a to-be-measured sample can be realized under SPP field enhancement.

The invention discloses a flow cytometry detection device, a preparation method and a system. The device comprises a surface plasmon excitation chip which is used for exciting surface plasmon under the irradiation of polarized light and comprises a transparent substrate and a metal film layer attached to the surface of the substrate; and a cell channel which comprises an inflow channel, a compression channel and a recovery channel, and the cell channel is bonded with the surface, attached with the metal film layer, of the chip to form a waterproof closed space, wherein a metal film layer is attached to the coverage area of the compression channel. When the device is in a working state, to-be-detected cells carried by a solution flow in from the flow-in channel, enter the compression channel, pass through the target detection area in a state of keeping in contact with the metal film layer, and flow out from the recovery channel. The device can effectively realize rapid detection of thesurface refractive index of a single to-be-detected cell.

To provide a method for producing complex crystal quantum crystals encapsulating plasmon metal quantum dots. [Solution] Quantum crystals are produced by a method characterized in that an aqueous plasmon metal complex solution formed from a ligand and a plasmon metal selected from gold, silver, copper, nickel, zinc, aluminum, and platinum is prepared and brought into contact with a carrier formed from a metal or a metal alloy having an electrode potential lower than that of the plasmon metal, or a metal that has been brought to an electrode potential lower than that of the plasmon metal, such that plasmon metal complex is precipitated and quantum crystals having a plasmon enhancement effect are disposed on the metal carrier. The metal complex crystals encapsulate metal quantum dots, and excellent subject adsorption capability, as well as an excellent surface plasmon excitation-field enhancement effect, is obtained as a result of the quantum size.

The invention discloses a detection method for exciting biological single molecule terahertz resonance, the detection method comprises a nano plasmon optical tweezers device, and the nano plasmon optical tweezers device comprises an excitation light unit, a surface plasmon excitation unit and a monitoring unit. The surface plasmon excitation unit comprises a slide plated with a gold film, a micro-nano structure solution is arranged on the surface of the slide, and the micro-nano structure solution is used for dynamically controlling and trapping biological single molecules to be detected; the excitation light unit generates terahertz light and emits the terahertz light to the surface plasmon excitation unit, the terahertz light excites biological single-molecule terahertz resonance, the terahertz light is coupled with reflected light of the micro-nano structure solution on the slide, and coupled light obtained after coupling is reflected into the monitoring unit, and high-resolution optical characterization of the biological single-molecule vibration spectrum is obtained. According to the scheme, optical direct measurement is carried out on vibration of the single biological single molecule in the solution, and the terahertz vibration spectrum of the biological single molecule is obtained.

Optical element 10 according to the present invention comprises light guide body 11, surface plasmon excitation means 14 that is provided on the interface with light guide body 11 and that allows surface plasmon to be excited by a specific polarization component of light whose polarization direction is orthogonal to the first direction y in the surface of light guide body 11, from among light entering from light guide body 11, and a light generation means that includes metal layer 12 and cover layer 13, and that generates light having the same polarization component as the specific polarization component of light, from surface plasmon produced in the interface between metal layer 12 and cover layer 13 in response to surface plasmon excited by the specific polarization component in surface plasmon excitation means 14. Surface plasmon excitation means 14 includes a plurality of protrusions 14a, each of which extends in the first direction y and is periodically arrayed along the second direction x orthogonal to the first direction y.

The invention provides a long-working distance plasmon nanolithography method. The method comprises steps: A) a bowtie lithography head is prepared; B) an exposure substrate is prepared; C) the bowtielithography head is closely contacted with the exposure substrate, that is, a first silver film layer of the bowtie lithography head is closely contacted with a photoresist layer of the exposure substrate; and D) a laser light source is adopted, through polarizer and objective lens adjustment, an exposure light field parallel with a bowtie-type aperture sharp corner is acquired, and a nanostructure is obtained through exposure and development. In comparison with the prior art, through involving the bowtie-type structure in an aluminum mask, local enhancement on the light field can be realizedto acquire higher resolution; through refractive index match between a silver layer and a PMMA layer, the surface plasmon excitation efficiency can be enhanced, and the exposure distance is prolonged; and a metal-medium-metal structure is formed through a silver layer-photoresist layer-silver layer, focal depth modulation can be realized, and the exposure depth is prolonged.

The invention provides a terahertz cooking oil detection chip and a cooking oil detection method. The terahertz cooking oil detection chip and the cooking oil detection method have the advantages thatefficient waveguide transmission devices, namely coplanar waveguide, and efficient energy input ends of the efficient waveguide transmission devices are designed, resonance of resonant rings can be excited by the efficient waveguide transmission devices, the efficient energy input ends and surface plasma polaritons, resonant peaks with high Q values (200-300) can be generated and can be observedvia detectors, accordingly, high-sensitivity terahertz detection can be carried out on different types of cooking oil, the scientific difficult problems in the aspect of cooking oil component quick detection can be solved by the aid of the terahertz cooking oil detection chip and the cooking oil detection method, and the foundation can be laid for carrying out scientific research work in later periods and solving problems in real life; the terahertz cooking oil detection chip is easy and convenient to operate during practical application, and the detection efficiency of terahertz waveband sensors can be improved.

The invention provides a SPP optical tweezers device based on chiral dependent lens excitation. The SPP optical tweezers device comprises an excitation light unit and a surface plasmon excitation unit. The excitation light unit is used for generating the special light beams of the chiral dependent lens to be incident to the surface plasmon excitation unit. The surface plasmon excitation unit is used for exciting the convergent surface plasmon special light field on the contact surface between the metal film and the sample solution by the special light beams and dynamically controlling the micro-nano structures in the sample solution through the surface plasmon special light field, wherein the dynamic control includes capture and repulsion of the micro-nano structures in the sample solution.

The present invention relates to a system capable of performing simple and rapid inspection of an antigen equivalent to the immune chromatographic method with accuracy good as a PCR method. An embodiment relates to a novel fluorescence counting system for quantifying viruses or antibodies in an analyte which comprises an unit of providing an antigen or antibody phase solidified substrate by an aggregation method with quantum crystals, an unit for making a labeling liquor and labeling a virus or an antibody to be measured in the analyte by an antigen-antibody method, an unit of exciting the fluorescently labeled virus or antibody by a surface plasmon excitation method, and an unit of counting fluorescent points in an excited fluorescent screen to quantify the virus or antibody in the analyte.

The invention provides a semiconductor light-emitting element and a preparation method thereof. The semiconductor light-emitting element sequentially comprises a substrate, an n-type semiconductor layer, a quantum well layer and a p-type semiconductor layer from bottom to top, and further comprises a surface plasmon excited layer and a surface plasmon excitation layer, the quantum well layer is arranged on the p-type semiconductor layer, the surface plasmon excitation layer is arranged on the p-type semiconductor layer, and the surface plasmon excited layer is arranged between the quantum well layer and the p-type semiconductor layer and / or between the p-type semiconductor layer and the surface plasmon excitation layer. Through the surface plasmon excitation layer, the longitudinal hole injection efficiency and the transverse hole expansion capability of the two-dimensional hole gas of the surface plasmon excited layer can be induced and enhanced, the quantum efficiency of the semiconductor light-emitting element is improved, and the light-emitting uniformity and the ESD resistance of the semiconductor light-emitting element are enhanced.

A localized surface plasmon resonance sensor may include a localized surface plasmon excitation layer including a chalcogenide material. The chalcogenide material may include: a first material including at least one of selenium (Se) and tellurium (Te); and a second material including at least one of germanium (Ge) and antimony (Sb). The localized surface plasmon excitation layer may be prepared by forming a thin film including the chalcogenide material and crystallizing the thin film to have a predetermined pattern by irradiating laser on the thin film.

[Problem] To provide a method for producing a quantum crystal of a metal complex encapsulating plasmon metal quantum dots. [Solution] The presnt quantum crystals are produced by a method charactgerized in that an aqueous solution of plasmon metal complex made from a ligand and a plasmon metal selected from the group consisting of gold, silver, copper, nickel, zinc, aluminium, and platinum, is prepared and brought into contact with a metal carrier made of a metal or a metal alloy having an electrode potential lower than that of the plasmon metal in the aqueous solution, such that the plasmon metal complex is preciptated as quantum crystals arranged on the metal carrier, resulting in having a plasmon enhancement effect. The metal complex crystals encapsulate metal quantum dots, so that an excellent adsorption capability of sample to be detected, as well as an excellent surface plasmon exitation electrofield enhancement effects, are obtained as a result of the quantum size effect.

The invention discloses a graphene surface plasmon device, which includes a capacitor-like structure formed by a conductive periodic scatterer-dielectric layer-graphene layer, so that the conductive periodic scatterer, such as one-dimensional / two-dimensional Conductive gratings are used to increase the wave vector of free-space light to match the wave vector of graphene conduction-type plasmons to excite graphene conduction-type plasmons; The electron concentration of graphene can be adjusted by applying voltage between the periodic scatterers, so as to realize the dynamic regulation of graphene surface plasmons, that is, the conductive periodic scatterers not only serve as the excitation structure of graphene plasmons, At the same time, it is also used as an electrode for the regulation of graphene electron concentration to realize the dynamic regulation of graphene surface plasmons. Correspondingly, the present invention also provides a graphene surface plasmon waveguide and a corresponding optoelectronic device.